Hello, I believe this is a common issue although one which I cannot resolve. My setup Sony KD-75XG80xx purchased in 2020 and Sonos Beam worked faultlessly for 9months.
All of a sudden the beam will no longer work with the T.V. However it does play music.
After looking on this forum I have done everything that the community has suggested to no avail.
firstly I removed the T.V from the wall to check the connections. All ok.
I then swapped the original HDMI cable supplied from Sonos to another one. No change.
I then removed all other HDMI equipment from the T.V. I checked the audio settings on the T.V and all the same as before, Bravia Sync on Audio and to audio out.
I then removed all HDMI ports from the T.V including the ARC connected to Sonos and turned everything off over night (about 8 hours) including T.V and Sonos Beam.
I then turned the T.V on and re connected the ARC and repeated the process of trying to connect the Sonos to the T.V didn’t work.
Out of ideas and getting very frustrated. Of corse Fibre optic is an option but if the setup has worked faultlessly for 9months I would rather reinstate this function.
Any help would be great fully received.